/////    /////    /////    /////
/////    /////    /////    /////
/////    /////    /////    /////
/////    /////    /////    /////
/////             /////    /////
/////             /////    /////
/////    /////    /////    /////
/////    /////    /////    /////
/////    /////
/////    /////
/////    /////    /////    /////
/////    /////    /////    /////
/////    /////    /////    /////
/////    /////    /////    /////

/**
 * ScrollReveal
 * ------------
 * Version : 3.3.6
 * Website : scrollrevealjs.org
 * Repo    : github.com/jlmakes/scrollreveal.js
 * Author  : Julian Lloyd (@jlmakes)
 */

;(function () {
    'use strict'

    var sr
    var _requestAnimationFrame

    function ScrollReveal (config) {
        // Support instantiation without the `new` keyword.
        if (typeof this === 'undefined' || Object.getPrototypeOf(this) !== ScrollReveal.prototype) {
            return new ScrollReveal(config)
        }

        sr = this // Save reference to instance.
        sr.version = '3.3.6'
        sr.tools = new Tools() // *required utilities

        if (sr.isSupported()) {
            sr.tools.extend(sr.defaults, config || {})

            sr.defaults.container = _resolveContainer(sr.defaults)

            sr.store = {
                elements: {},
                containers: []
            }

            sr.sequences = {}
            sr.history = []
            sr.uid = 0
            sr.initialized = false
        } else if (typeof console !== 'undefined' && console !== null) {
            // Note: IE9 only supports console if devtools are open.
            console.log('ScrollReveal is not supported in this browser.')
        }

        return sr
    }

    /**
     * Configuration
     * -------------
     * This object signature can be passed directly to the ScrollReveal constructor,
     * or as the second argument of the `reveal()` method.
     */

    ScrollReveal.prototype.defaults = {
        // 'bottom', 'left', 'top', 'right'
        origin: 'bottom',

        // Can be any valid CSS distance, e.g. '5rem', '10%', '20vw', etc.
        distance: '20px',

        // Time in milliseconds.
        duration: 500,
        delay: 0,

        // Starting angles in degrees, will transition from these values to 0 in all axes.
        rotate: { x: 0, y: 0, z: 0 },

        // Starting opacity value, before transitioning to the computed opacity.
        opacity: 0,

        // Starting scale value, will transition from this value to 1
        scale: 0.9,

        // Accepts any valid CSS easing, e.g. 'ease', 'ease-in-out', 'linear', etc.
        easing: 'cubic-bezier(0.6, 0.2, 0.1, 1)',

        // `<html>` is the default reveal container. You can pass either:
        // DOM Node, e.g. document.querySelector('.fooContainer')
        // Selector, e.g. '.fooContainer'
        container: window.document.documentElement,

        // true/false to control reveal animations on mobile.
        mobile: true,

        // true:  reveals occur every time elements become visible
        // false: reveals occur once as elements become visible
        reset: false,

        // 'always' — delay for all reveal animations
        // 'once'   — delay only the first time reveals occur
        // 'onload' - delay only for animations triggered by first load
        useDelay: 'always',

        // Change when an element is considered in the viewport. The default value
        // of 0.20 means 20% of an element must be visible for its reveal to occur.
        viewFactor: 0.2,

        // Pixel values that alter the container boundaries.
        // e.g. Set `{ top: 48 }`, if you have a 48px tall fixed toolbar.
        // --
        // Visual Aid: https://scrollrevealjs.org/assets/viewoffset.png
        viewOffset: { top: 0, right: 0, bottom: 0, left: 0 },

        // Callbacks that fire for each triggered element reveal, and reset.
        beforeReveal: function (domEl) {},
        beforeReset: function (domEl) {},

        // Callbacks that fire for each completed element reveal, and reset.
        afterReveal: function (domEl) {},
        afterReset: function (domEl) {}
    }

    /**
     * Check if client supports CSS Transform and CSS Transition.
     * @return {boolean}
     */
    ScrollReveal.prototype.isSupported = function () {
        var style = document.documentElement.style
        return 'WebkitTransition' in style && 'WebkitTransform' in style ||
            'transition' in style && 'transform' in style
    }

    /**
     * Creates a reveal set, a group of elements that will animate when they
     * become visible. If [interval] is provided, a new sequence is created
     * that will ensure elements reveal in the order they appear in the DOM.
     *
     * @param {Node|NodeList|string} [target]   The node, node list or selector to use for animation.
     * @param {Object}               [config]   Override the defaults for this reveal set.
     * @param {number}               [interval] Time between sequenced element animations (milliseconds).
     * @param {boolean}              [sync]     Used internally when updating reveals for async content.
     *
     * @return {Object} The current ScrollReveal instance.
     */
    ScrollReveal.prototype.reveal = function (target, config, interval, sync) {
        var container
        var elements
        var elem
        var elemId
        var sequence
        var sequenceId

        // No custom configuration was passed, but a sequence interval instead.
        // let’s shuffle things around to make sure everything works.
        if (config !== undefined && typeof config === 'number') {
            interval = config
            config = {}
        } else if (config === undefined || config === null) {
            config = {}
        }

        container = _resolveContainer(config)
        elements = _getRevealElements(target, container)

        if (!elements.length) {
            console.log('ScrollReveal: reveal on "' + target + '" failed, no elements found.')
            return sr
        }

        // Prepare a new sequence if an interval is passed.
        if (interval && typeof interval === 'number') {
            sequenceId = _nextUid()

            sequence = sr.sequences[sequenceId] = {
                id: sequenceId,
                interval: interval,
                elemIds: [],
                active: false
            }
        }

        // Begin main loop to configure ScrollReveal elements.
        for (var i = 0; i < elements.length; i++) {
            // Check if the element has already been configured and grab it from the store.
            elemId = elements[i].getAttribute('data-sr-id')
            if (elemId) {
                elem = sr.store.elements[elemId]
            } else {
                // Otherwise, let’s do some basic setup.
                elem = {
                    id: _nextUid(),
                    domEl: elements[i],
                    seen: false,
                    revealing: false
                }
                elem.domEl.setAttribute('data-sr-id', elem.id)
            }

            // Sequence only setup
            if (sequence) {
                elem.sequence = {
                    id: sequence.id,
                    index: sequence.elemIds.length
                }

                sequence.elemIds.push(elem.id)
            }

            // New or existing element, it’s time to update its configuration, styles,
            // and send the updates to our store.
            _configure(elem, config, container)
            _style(elem)
            _updateStore(elem)

            // We need to make sure elements are set to visibility: visible, even when
            // on mobile and `config.mobile === false`, or if unsupported.
            if (sr.tools.isMobile() && !elem.config.mobile || !sr.isSupported()) {
                elem.domEl.setAttribute('style', elem.styles.inline)
                elem.disabled = true
            } else if (!elem.revealing) {
                // Otherwise, proceed normally.
                elem.domEl.setAttribute('style',
                    elem.styles.inline +
                    elem.styles.transform.initial
                )
            }
        }

        // Each `reveal()` is recorded so that when calling `sync()` while working
        // with asynchronously loaded content, it can re-trace your steps but with
        // all your new elements now in the DOM.

        // Since `reveal()` is called internally by `sync()`, we don’t want to
        // record or intiialize each reveal during syncing.
        if (!sync && sr.isSupported()) {
            _record(target, config, interval)

            // We push initialization to the event queue using setTimeout, so that we can
            // give ScrollReveal room to process all reveal calls before putting things into motion.
            // --
            // Philip Roberts - What the heck is the event loop anyway? (JSConf EU 2014)
            // https://www.youtube.com/watch?v=8aGhZQkoFbQ
            if (sr.initTimeout) {
                window.clearTimeout(sr.initTimeout)
            }
            sr.initTimeout = window.setTimeout(_init, 0)
        }

        return sr
    }

    /**
     * Re-runs `reveal()` for each record stored in history, effectively capturing
     * any content loaded asynchronously that matches existing reveal set targets.
     * @return {Object} The current ScrollReveal instance.
     */
    ScrollReveal.prototype.sync = function () {
        if (sr.history.length && sr.isSupported()) {
            for (var i = 0; i < sr.history.length; i++) {
                var record = sr.history[i]
                sr.reveal(record.target, record.config, record.interval, true)
            }
            _init()
        } else {
            console.log('ScrollReveal: sync failed, no reveals found.')
        }
        return sr
    }

    /**
     * Private Methods
     * ---------------
     */

    function _resolveContainer (config) {
        if (config && config.container) {
            if (typeof config.container === 'string') {
                return window.document.documentElement.querySelector(config.container)
            } else if (sr.tools.isNode(config.container)) {
                return config.container
            } else {
                console.log('ScrollReveal: invalid container "' + config.container + '" provided.')
                console.log('ScrollReveal: falling back to default container.')
            }
        }
        return sr.defaults.container
    }

    /**
     * check to see if a node or node list was passed in as the target,
     * otherwise query the container using target as a selector.
     *
     * @param {Node|NodeList|string} [target]    client input for reveal target.
     * @param {Node}                 [container] parent element for selector queries.
     *
     * @return {array} elements to be revealed.
     */
    function _getRevealElements (target, container) {
        if (typeof target === 'string') {
            return Array.prototype.slice.call(container.querySelectorAll(target))
        } else if (sr.tools.isNode(target)) {
            return [target]
        } else if (sr.tools.isNodeList(target)) {
            return Array.prototype.slice.call(target)
        }
        return []
    }

    /**
     * A consistent way of creating unique IDs.
     * @returns {number}
     */
    function _nextUid () {
        return ++sr.uid
    }

    function _configure (elem, config, container) {
        // If a container was passed as a part of the config object,
        // let’s overwrite it with the resolved container passed in.
        if (config.container) config.container = container
        // If the element hasn’t already been configured, let’s use a clone of the
        // defaults extended by the configuration passed as the second argument.
        if (!elem.config) {
            elem.config = sr.tools.extendClone(sr.defaults, config)
        } else {
            // Otherwise, let’s use a clone of the existing element configuration extended
            // by the configuration passed as the second argument.
            elem.config = sr.tools.extendClone(elem.config, config)
        }

        // Infer CSS Transform axis from origin string.
        if (elem.config.origin === 'top' || elem.config.origin === 'bottom') {
            elem.config.axis = 'Y'
        } else {
            elem.config.axis = 'X'
        }
    }

    function _style (elem) {
        var computed = window.getComputedStyle(elem.domEl)

        if (!elem.styles) {
            elem.styles = {
                transition: {},
                transform: {},
                computed: {}
            }

            // Capture any existing inline styles, and add our visibility override.
            // --
            // See section 4.2. in the Documentation:
            // https://github.com/jlmakes/scrollreveal.js#42-improve-user-experience
            elem.styles.inline = elem.domEl.getAttribute('style') || ''
            elem.styles.inline += '; visibility: visible; '

            // grab the elements existing opacity.
            elem.styles.computed.opacity = computed.opacity

            // grab the elements existing transitions.
            if (!computed.transition || computed.transition === 'all 0s ease 0s') {
                elem.styles.computed.transition = ''
            } else {
                elem.styles.computed.transition = computed.transition + ', '
            }
        }

        // Create transition styles
        elem.styles.transition.instant = _generateTransition(elem, 0)
        elem.styles.transition.delayed = _generateTransition(elem, elem.config.delay)

        // Generate transform styles, first with the webkit prefix.
        elem.styles.transform.initial = ' -webkit-transform:'
        elem.styles.transform.target = ' -webkit-transform:'
        _generateTransform(elem)

        // And again without any prefix.
        elem.styles.transform.initial += 'transform:'
        elem.styles.transform.target += 'transform:'
        _generateTransform(elem)
    }

    function _generateTransition (elem, delay) {
        var config = elem.config

        return '-webkit-transition: ' + elem.styles.computed.transition +
            '-webkit-transform ' + config.duration / 1000 + 's ' +
            config.easing + ' ' +
            delay / 1000 + 's, opacity ' +
            config.duration / 1000 + 's ' +
            config.easing + ' ' +
            delay / 1000 + 's; ' +

            'transition: ' + elem.styles.computed.transition +
            'transform ' + config.duration / 1000 + 's ' +
            config.easing + ' ' +
            delay / 1000 + 's, opacity ' +
            config.duration / 1000 + 's ' +
            config.easing + ' ' +
            delay / 1000 + 's; '
    }

    function _generateTransform (elem) {
        var config = elem.config
        var cssDistance
        var transform = elem.styles.transform

        // Let’s make sure our our pixel distances are negative for top and left.
        // e.g. origin = 'top' and distance = '25px' starts at `top: -25px` in CSS.
        if (config.origin === 'top' || config.origin === 'left') {
            cssDistance = /^-/.test(config.distance)
                ? config.distance.substr(1)
                : '-' + config.distance
        } else {
            cssDistance = config.distance
        }

        if (parseInt(config.distance)) {
            transform.initial += ' translate' + config.axis + '(' + cssDistance + ')'
            transform.target += ' translate' + config.axis + '(0)'
        }
        if (config.scale) {
            transform.initial += ' scale(' + config.scale + ')'
            transform.target += ' scale(1)'
        }
        if (config.rotate.x) {
            transform.initial += ' rotateX(' + config.rotate.x + 'deg)'
            transform.target += ' rotateX(0)'
        }
        if (config.rotate.y) {
            transform.initial += ' rotateY(' + config.rotate.y + 'deg)'
            transform.target += ' rotateY(0)'
        }
        if (config.rotate.z) {
            transform.initial += ' rotateZ(' + config.rotate.z + 'deg)'
            transform.target += ' rotateZ(0)'
        }
        transform.initial += '; opacity: ' + config.opacity + ';'
        transform.target += '; opacity: ' + elem.styles.computed.opacity + ';'
    }

    function _updateStore (elem) {
        var container = elem.config.container

        // If this element’s container isn’t already in the store, let’s add it.
        if (container && sr.store.containers.indexOf(container) === -1) {
            sr.store.containers.push(elem.config.container)
        }

        // Update the element stored with our new element.
        sr.store.elements[elem.id] = elem
    }

    function _record (target, config, interval) {
        // Save the `reveal()` arguments that triggered this `_record()` call, so we
        // can re-trace our steps when calling the `sync()` method.
        var record = {
            target: target,
            config: config,
            interval: interval
        }
        sr.history.push(record)
    }

    function _init () {
        if (sr.isSupported()) {
            // Initial animate call triggers valid reveal animations on first load.
            // Subsequent animate calls are made inside the event handler.
            _animate()

            // Then we loop through all container nodes in the store and bind event
            // listeners to each.
            for (var i = 0; i < sr.store.containers.length; i++) {
                sr.store.containers[i].addEventListener('scroll', _handler)
                sr.store.containers[i].addEventListener('resize', _handler)
            }

            // Let’s also do a one-time binding of window event listeners.
            if (!sr.initialized) {
                window.addEventListener('scroll', _handler)
                window.addEventListener('resize', _handler)
                sr.initialized = true
            }
        }
        return sr
    }

    function _handler () {
        _requestAnimationFrame(_animate)
    }

    function _setActiveSequences () {
        var active
        var elem
        var elemId
        var sequence

        // Loop through all sequences
        sr.tools.forOwn(sr.sequences, function (sequenceId) {
            sequence = sr.sequences[sequenceId]
            active = false

            // For each sequenced elemenet, let’s check visibility and if
            // any are visible, set it’s sequence to active.
            for (var i = 0; i < sequence.elemIds.length; i++) {
                elemId = sequence.elemIds[i]
                elem = sr.store.elements[elemId]
                if (_isElemVisible(elem) && !active) {
                    active = true
                }
            }

            sequence.active = active
        })
    }

    function _animate () {
        var delayed
        var elem

        _setActiveSequences()

        // Loop through all elements in the store
        sr.tools.forOwn(sr.store.elements, function (elemId) {
            elem = sr.store.elements[elemId]
            delayed = _shouldUseDelay(elem)

            // Let’s see if we should revealand if so,
            // trigger the `beforeReveal` callback and
            // determine whether or not to use delay.
            if (_shouldReveal(elem)) {
                elem.config.beforeReveal(elem.domEl)
                if (delayed) {
                    elem.domEl.setAttribute('style',
                        elem.styles.inline +
                        elem.styles.transform.target +
                        elem.styles.transition.delayed
                    )
                } else {
                    elem.domEl.setAttribute('style',
                        elem.styles.inline +
                        elem.styles.transform.target +
                        elem.styles.transition.instant
                    )
                }

                // Let’s queue the `afterReveal` callback
                // and mark the element as seen and revealing.
                _queueCallback('reveal', elem, delayed)
                elem.revealing = true
                elem.seen = true

                if (elem.sequence) {
                    _queueNextInSequence(elem, delayed)
                }
            } else if (_shouldReset(elem)) {
                //Otherwise reset our element and
                // trigger the `beforeReset` callback.
                elem.config.beforeReset(elem.domEl)
                elem.domEl.setAttribute('style',
                    elem.styles.inline +
                    elem.styles.transform.initial +
                    elem.styles.transition.instant
                )
                // And queue the `afterReset` callback.
                _queueCallback('reset', elem)
                elem.revealing = false
            }
        })
    }

    function _queueNextInSequence (elem, delayed) {
        var elapsed = 0
        var delay = 0
        var sequence = sr.sequences[elem.sequence.id]

        // We’re processing a sequenced element, so let's block other elements in this sequence.
        sequence.blocked = true

        // Since we’re triggering animations a part of a sequence after animations on first load,
        // we need to check for that condition and explicitly add the delay to our timer.
        if (delayed && elem.config.useDelay === 'onload') {
            delay = elem.config.delay
        }

        // If a sequence timer is already running, capture the elapsed time and clear it.
        if (elem.sequence.timer) {
            elapsed = Math.abs(elem.sequence.timer.started - new Date())
            window.clearTimeout(elem.sequence.timer)
        }

        // Start a new timer.
        elem.sequence.timer = { started: new Date() }
        elem.sequence.timer.clock = window.setTimeout(function () {
            // Sequence interval has passed, so unblock the sequence and re-run the handler.
            sequence.blocked = false
            elem.sequence.timer = null
            _handler()
        }, Math.abs(sequence.interval) + delay - elapsed)
    }

    function _queueCallback (type, elem, delayed) {
        var elapsed = 0
        var duration = 0
        var callback = 'after'

        // Check which callback we’re working with.
        switch (type) {
            case 'reveal':
                duration = elem.config.duration
                if (delayed) {
                    duration += elem.config.delay
                }
                callback += 'Reveal'
                break

            case 'reset':
                duration = elem.config.duration
                callback += 'Reset'
                break
        }

        // If a timer is already running, capture the elapsed time and clear it.
        if (elem.timer) {
            elapsed = Math.abs(elem.timer.started - new Date())
            window.clearTimeout(elem.timer.clock)
        }

        // Start a new timer.
        elem.timer = { started: new Date() }
        elem.timer.clock = window.setTimeout(function () {
            // The timer completed, so let’s fire the callback and null the timer.
            elem.config[callback](elem.domEl)
            elem.timer = null
        }, duration - elapsed)
    }

    function _shouldReveal (elem) {
        if (elem.sequence) {
            var sequence = sr.sequences[elem.sequence.id]
            return sequence.active &&
                !sequence.blocked &&
                !elem.revealing &&
                !elem.disabled
        }
        return _isElemVisible(elem) &&
            !elem.revealing &&
            !elem.disabled
    }

    function _shouldUseDelay (elem) {
        var config = elem.config.useDelay
        return config === 'always' ||
            (config === 'onload' && !sr.initialized) ||
            (config === 'once' && !elem.seen)
    }

    function _shouldReset (elem) {
        if (elem.sequence) {
            var sequence = sr.sequences[elem.sequence.id]
            return !sequence.active &&
                elem.config.reset &&
                elem.revealing &&
                !elem.disabled
        }
        return !_isElemVisible(elem) &&
            elem.config.reset &&
            elem.revealing &&
            !elem.disabled
    }

    function _getContainer (container) {
        return {
            width: container.clientWidth,
            height: container.clientHeight
        }
    }

    function _getScrolled (container) {
        // Return the container scroll values, plus the its offset.
        if (container && container !== window.document.documentElement) {
            var offset = _getOffset(container)
            return {
                x: container.scrollLeft + offset.left,
                y: container.scrollTop + offset.top
            }
        } else {
            // Otherwise, default to the window object’s scroll values.
            return {
                x: window.pageXOffset,
                y: window.pageYOffset
            }
        }
    }

    function _getOffset (domEl) {
        var offsetTop = 0
        var offsetLeft = 0

        // Grab the element’s dimensions.
        var offsetHeight = domEl.offsetHeight
        var offsetWidth = domEl.offsetWidth

        // Now calculate the distance between the element and its parent, then
        // again for the parent to its parent, and again etc... until we have the
        // total distance of the element to the document’s top and left origin.
        do {
            if (!isNaN(domEl.offsetTop)) {
                offsetTop += domEl.offsetTop
            }
            if (!isNaN(domEl.offsetLeft)) {
                offsetLeft += domEl.offsetLeft
            }
            domEl = domEl.offsetParent
        } while (domEl)

        return {
            top: offsetTop,
            left: offsetLeft,
            height: offsetHeight,
            width: offsetWidth
        }
    }

    function _isElemVisible (elem) {
        var offset = _getOffset(elem.domEl)
        var container = _getContainer(elem.config.container)
        var scrolled = _getScrolled(elem.config.container)
        var vF = elem.config.viewFactor

        // Define the element geometry.
        var elemHeight = offset.height
        var elemWidth = offset.width
        var elemTop = offset.top
        var elemLeft = offset.left
        var elemBottom = elemTop + elemHeight
        var elemRight = elemLeft + elemWidth

        return confirmBounds() || isPositionFixed()

        function confirmBounds () {
            // Define the element’s functional boundaries using its view factor.
            var top = elemTop + elemHeight * vF
            var left = elemLeft + elemWidth * vF
            var bottom = elemBottom - elemHeight * vF
            var right = elemRight - elemWidth * vF

            // Define the container functional boundaries using its view offset.
            var viewTop = scrolled.y + elem.config.viewOffset.top
            var viewLeft = scrolled.x + elem.config.viewOffset.left
            var viewBottom = scrolled.y - elem.config.viewOffset.bottom + container.height
            var viewRight = scrolled.x - elem.config.viewOffset.right + container.width

            return top < viewBottom &&
                bottom > viewTop &&
                left < viewRight &&
                right > viewLeft
        }

        function isPositionFixed () {
            return (window.getComputedStyle(elem.domEl).position === 'fixed')
        }
    }

    /**
     * Utilities
     * ---------
     */

    function Tools () {}

    Tools.prototype.isObject = function (object) {
        return object !== null && typeof object === 'object' && object.constructor === Object
    }

    Tools.prototype.isNode = function (object) {
        return typeof window.Node === 'object'
            ? object instanceof window.Node
            : object && typeof object === 'object' &&
            typeof object.nodeType === 'number' &&
            typeof object.nodeName === 'string'
    }

    Tools.prototype.isNodeList = function (object) {
        var prototypeToString = Object.prototype.toString.call(object)
        var regex = /^\[object (HTMLCollection|NodeList|Object)\]$/

        return typeof window.NodeList === 'object'
            ? object instanceof window.NodeList
            : object && typeof object === 'object' &&
            regex.test(prototypeToString) &&
            typeof object.length === 'number' &&
            (object.length === 0 || this.isNode(object[0]))
    }

    Tools.prototype.forOwn = function (object, callback) {
        if (!this.isObject(object)) {
            throw new TypeError('Expected "object", but received "' + typeof object + '".')
        } else {
            for (var property in object) {
                if (object.hasOwnProperty(property)) {
                    callback(property)
                }
            }
        }
    }

    Tools.prototype.extend = function (target, source) {
        this.forOwn(source, function (property) {
            if (this.isObject(source[property])) {
                if (!target[property] || !this.isObject(target[property])) {
                    target[property] = {}
                }
                this.extend(target[property], source[property])
            } else {
                target[property] = source[property]
            }
        }.bind(this))
        return target
    }

    Tools.prototype.extendClone = function (target, source) {
        return this.extend(this.extend({}, target), source)
    }

    Tools.prototype.isMobile = function () {
        return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)
    }

    /**
     * Polyfills
     * --------
     */

    _requestAnimationFrame = window.requestAnimationFrame ||
        window.webkitRequestAnimationFrame ||
        window.mozRequestAnimationFrame ||
        function (callback) {
            window.setTimeout(callback, 1000 / 60)
        }

    /**
     * Module Wrapper
     * --------------
     */
    if (typeof define === 'function' && typeof define.amd === 'object' && define.amd) {
        define(function () {
            return ScrollReveal
        })
    } else if (typeof module !== 'undefined' && module.exports) {
        module.exports = ScrollReveal
    } else {
        window.ScrollReveal = ScrollReveal
    }
})();